* [PATCH 4.4 23/23] pinctrl: samsung: Remove bogus irq_[un]mask from resource management
[not found] <20170815011754.234902525@linuxfoundation.org>
@ 2017-08-15 1:18 ` Greg Kroah-Hartman
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From: Greg Kroah-Hartman @ 2017-08-15 1:18 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Thomas Gleixner, Krzysztof Kozlowski,
Sylwester Nawrocki, Linus Walleij, Kukjin Kim, linux-arm-kernel,
linux-samsung-soc, linux-gpio, Tomasz Figa
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Thomas Gleixner <tglx@linutronix.de>
commit 3fa53ec2ed885b0aec3f0472e3b4a8a6f1cd748c upstream.
The irq chip callbacks irq_request/release_resources() have absolutely no
business with masking and unmasking the irq.
The core code unmasks the interrupt after complete setup and masks it
before invoking irq_release_resources().
The unmask is actually harmful as it happens before the interrupt is
completely initialized in __setup_irq().
Remove it.
Fixes: f6a8249f9e55 ("pinctrl: exynos: Lock GPIOs as interrupts when used as EINTs")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-gpio@vger.kernel.org
Acked-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/pinctrl/samsung/pinctrl-exynos.c | 4 ----
1 file changed, 4 deletions(-)
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -194,8 +194,6 @@ static int exynos_irq_request_resources(
spin_unlock_irqrestore(&bank->slock, flags);
- exynos_irq_unmask(irqd);
-
return 0;
}
@@ -216,8 +214,6 @@ static void exynos_irq_release_resources
shift = irqd->hwirq * bank_type->fld_width[PINCFG_TYPE_FUNC];
mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1;
- exynos_irq_mask(irqd);
-
spin_lock_irqsave(&bank->slock, flags);
con = readl(d->virt_base + reg_con);
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